SunHydrogen Inc (HYSR)

[0PointE]

Interesting reimagining of the internal combustion engine with an additional piston stroke powered by the rapid expansion of water by the heated engine. These engines would need a large source of distilled water. Another job for HyperSolar via the splitting of waste water and recombination into pure water if that were to take off (although pure water for consumption and hydrogen fuel cell powered engines, in my humble opinion, is a much better path)

http://www.damninteresting.com/the-six-stroke-engine/